Electron Bearn Depolarization in a Damping Ring*
نویسنده
چکیده
Depolarization of a polarized electron beam injected into a damping ring is analyzed by extending calculk tions conventionally applied to proton synchrotrons. Synchrotron radiation in an electron ring gives rise to both polarizing and depolarizing effects. In a damping ring, the beam is stored for a time much less than the time for self polarization. Spin &p radiation may therefore be na glected. Synchrotron radiation without spin flips, however, must be considered as the resonance strength depends on the vertical betatron oscillation amplitude which changes as the electron beam is radiation damped. An expression for the beam polarization at extraction is derived which takes into account radiation damping. The results are ap plied to the electron ring at the Stanford Linear Collider and are compared with numerical matrix formalisms.
منابع مشابه
Lifetime Measurement of ATF Damping Ring
The purpose of the ATF darnping ring is the development of technologies for .producing a low ernittance bearn required in future linear colliders such as . .-, -_ JLC. The lifetime of the damping ring is very short (typically a few minutes). It is limited by elastic beam-gas scattering along with a srnall dynamic aperture, and by single intra-beam scattering (Touschek effect). The Touschek life...
متن کاملStudy for Ilc Damping Ring at Kekb
ILC damping ring consists of very low emittance electron and positron storage rings. It is necessary for ILC damping ring to study electron cloud effects in such low emittance positron ring. We propose a low emittance operation of KEKB to study the effects.
متن کاملIon Effects in the Electron Damping Ring of the International Linear Collider*
Ion-induced beam instabilities and tune shifts are critical issues for the electron damping ring of the International Linear Collider (ILC). To avoid conventional ion trapping, a long gap is introduced in the electron beam by omitting a number of successive bunches out of a long train. However, the beam can still suffer from the fast ion instability, driven by ions that last only for a single p...
متن کاملElectron Cloud Effect in Damping Rings of Linear Colliders
Design of Linear Collider projects are in progress as a world wide collaboration. There are two possibility for the linear collider scheme: one is normal conducting cavity with X/C band power source, and another is superconducting cavity with L band power source. A positron damping ring storages positron beam during several damping time and extracts the beam with a very low emittance to a main ...
متن کاملQualitative Analysis of Electron cloud effects in the NLC damping ring*
The qualitative analysis of the electron cloud formation is presented. Results are compared with simulations for the NLC damping ring [1].
متن کامل